/*!	 layerparamunsetstatic.cpp
**	 Template File
**
**	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
**	Copyright (c) 2010 Carlos López
**
**	This package is free software; you can redistribute it and/or
**	modify it under the terms of the GNU General Public License as
**	published by the Free Software Foundation; either version 2 of
**	the License, or (at your option) any later version.
**
**	This package is distributed in the hope that it will be useful,
**	but WITHOUT ANY WARRANTY; without even the implied warranty of
**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
**	General Public License for more details.
**
*/

#ifdef USING_PCH
#	include "pch.h"
#else
#ifdef HAVE_CONFIG_H
#	include <config.h>
#endif

#include <synfig/general.h>

#include "layerparamunsetstatic.h"
#include <synfigapp/canvasinterface.h>

#include <synfigapp/localization.h>

#endif

using namespace std;
using namespace etl;
using namespace synfig;
using namespace synfigapp;
using namespace Action;

ACTION_INIT(Action::LayerParamUnSetStatic);
ACTION_SET_NAME(Action::LayerParamUnSetStatic, "LayerParamUnSetStatic");
ACTION_SET_LOCAL_NAME(Action::LayerParamUnSetStatic, N_("Allow Animation"));
ACTION_SET_TASK(Action::LayerParamUnSetStatic, "unsetstatic");
ACTION_SET_CATEGORY(Action::LayerParamUnSetStatic, Action::CATEGORY_VALUEDESC);
ACTION_SET_PRIORITY(Action::LayerParamUnSetStatic, 0);
ACTION_SET_VERSION(Action::LayerParamUnSetStatic, "0.0");
ACTION_SET_CVS_ID(Action::LayerParamUnSetStatic, "$Id$");

Action::LayerParamUnSetStatic::LayerParamUnSetStatic():
    old_static_value()
{ }

Action::ParamVocab
Action::LayerParamUnSetStatic::get_param_vocab()
{
    ParamVocab ret(Action::CanvasSpecific::get_param_vocab());

    ret.push_back(ParamDesc("value_desc", Param::TYPE_VALUEDESC)
                  .set_local_name(_("Value Desc"))
                 );

    return ret;
}

bool
Action::LayerParamUnSetStatic::is_candidate(const ParamList &x)
{
    if (!candidate_check(get_param_vocab(), x)) {
        return false;
    }

    ValueDesc value_desc(x.find("value_desc")->second.get_value_desc());

    if (!value_desc.parent_is_layer()) {
        return false;
    }

    synfig::ValueBase parameter;
    synfig::Layer::Handle _layer;
    synfig::String _param_name;
    _layer = value_desc.get_layer();
    _param_name = value_desc.get_param_name();

    if (!_layer || _param_name.empty()) {
        return false;
    }

    // Check that the parameter is not Value Node (Const, Animated or Linkable)
    if (_layer->dynamic_param_list().count(_param_name)) {
        return false;
    }

    // Retrieves the current parameter
    parameter = _layer->get_param(_param_name);

    // Check that the parameter is not a inline canvas
    if (parameter.get_type() == type_canvas && parameter.get(Canvas::Handle()))
        if (parameter.get(Canvas::Handle())->is_inline()) {
            return false;
        }

    // Check if it is not static
    if (!parameter.get_static()) {
        return false;
    }

    return true;

}

bool
Action::LayerParamUnSetStatic::set_param(const synfig::String& name, const Action::Param &param)
{

    if (!layer && name == "value_desc" && param.get_type() == Param::TYPE_VALUEDESC) {
        ValueDesc value_desc(param.get_value_desc());

        if (!value_desc.parent_is_layer()) {
            return false;
        }

        layer = Layer::Handle::cast_dynamic(value_desc.get_layer());

        if (!layer) {
            return false;
        }
    }

    if (param_name.empty() && name == "value_desc" && param.get_type() == Param::TYPE_VALUEDESC) {
        ValueDesc value_desc(param.get_value_desc());

        if (!value_desc.parent_is_layer()) {
            return false;
        }

        param_name = value_desc.get_param_name();

        if (param_name.empty()) {
            return false;
        }

    }

    return Action::CanvasSpecific::set_param(name, param);
}

bool
Action::LayerParamUnSetStatic::is_ready()const
{
    if (!layer || param_name.empty()) {
        return false;
    }

    return Action::CanvasSpecific::is_ready();
}

void
Action::LayerParamUnSetStatic::perform()
{
    // See if the parameter is dynamic
    if (layer->dynamic_param_list().count(param_name)) {
        throw Error(_("This action is not for Value Nodes!"));
    }

    old_static_value = true;

    ValueBase v = layer->get_param(param_name);
    v.set_static(false);

    if (!layer->set_param(param_name, v)) {
        throw Error(_("Layer did not accept static value."));
    }

    // Signal layer changed
    layer->changed();

    // Signal that a layer parameter changed
    if (get_canvas_interface()) {
        get_canvas_interface()->signal_layer_param_changed()(layer, param_name);
    }
}

void
Action::LayerParamUnSetStatic::undo()
{
    ValueBase v = layer->get_param(param_name);
    v.set_static(old_static_value);

    if (!layer->set_param(param_name, v)) {
        throw Error(_("Layer did not accept static value."));
    }

    // Signal layer changed
    layer->changed();

    // Signal that a layer parameter changed
    if (get_canvas_interface()) {
        get_canvas_interface()->signal_layer_param_changed()(layer, param_name);
    }
}